TinyWall - Lightweight and non-intrusive firewall
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
simplewall - Simple tool to configure Windows Filtering Platform (WFP) which can configure network activity on...
tcpdump - tcpdump is a common packet analyzer that runs under the command line.
GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...
netcat - Netcat is a featured networking utility which reads and writes data across network connections...